Systems and methods of infrared detection of coal mine polar gas

ABSTRACT

An infrared detection device can be used to detect coal mine polar gas. The detection device can include a central processor and a gas pool assembly having a moveable optical window. The moveable optical window can include a stationary pool body and a moveable pool body inserted into the stationary pool body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Non-provisional patentapplication Ser. No. 14/815,490; filed Jul. 31, 2015; and entitledSYSTEMS AND METHODS OF INFRARED DETECTION OF COAL MINE POLAR GAS; theentire contents of which are incorporated herein by reference. U.S.Non-provisional patent application Ser. No. 14/815,490 claims thebenefit of Chinese Patent Application No. 201410371238.5; filed Jul. 31,2014; and entitled INFRARED DETECTION DEVICE FOR COAL MINE POLAR GAS ANDDETECTION METHOD; the entire contents of which are incorporated hereinby reference.

BACKGROUND

Field

The present invention relates to an infrared spectrum analysistechnology and device for gas, more particularly, relates to an infrareddetection device for coal mine polar gas and a detection method for thesame.

Description of Related Art

Different oxidation stages of spontaneous combustion of coal correspondto different auto-ignition temperature ranges, different kinds andconcentrations of gas products. The gas products for forecasting andpredicting the spontaneous combustion process typically include CO, CO2,CH4, C2H6, C3H8, C4H10, C2H4, C3H6, C2H2, and the like. The spontaneouscombustion of coal can be precisely forecasted according toconstitution, concentration, changing rate and other characteristics ofthe oxidized gas products, which can allow a coal mine to befire-proofed for safe production of work. The indications for detectingspontaneous combustion mainly include the indication of CO andderivative thereof, the indication of alkene-alkane ratio, theindication of alkyne gas, the indication of alkane ratio and the like.

During the management and reuse of a mine closed for a fire, thecomposition of the gas in the fire site should be monitored. At thistime the monitored gases mainly comprise CO, C₂H₂, C₂H₄. However, aftera gas explosion at a coal mine, the main noxious gases comprise CO,C₂H₄, C₂H₆ and the like. Thus, during the production of coal, in orderto prevent the spontaneous combustion of coal and the gas explosion ofthe coal mine whether in the daily production of coal or in theemergency and rescue after the disaster, the above-mentioned gas shouldbe analyzed quickly and precisely.

Current gas detection methods for the coal mine industry comprise asensor-based method and a gas chromatography. The sensor-based method isimpacted by downhole conditions and the detection result thereof thushas relatively large error. For instance, in case of low concentrationof oxygen, a methane sensor equipped in a present portal explosionmeasuring instrument will produce a result with relatively largedeviation. As for the gas chromatography, different components of thegas to be detected have to be adsorbed to and desorbed from achromatographic column at different time periods, thus the wholeanalysis may take a long time such that a timely analysis cannot beachieved. Meanwhile the chromatographic column in the chromatographicanalysis device may require frequent maintenance. Furthermore, theprocedure of the chromatographic analysis system generally has to test asample first each time, thus the technology is quite complicated and theanalysis result will vary from person to person due to the differentlevels of technical skill.

An infrared spectrum analyzer may analyze the gas with the help of a gaspool. Since impacted by the structure of the gas pool, background gasinside the pool cannot be completely discharged, which may have anadverse impact on the test result. When gas concentration is monitoredby being sampled continuously, this impact will be moderated by blowinggas over a longer period of time. However, the interference gaseventually cannot be thoroughly discharged. With regard to theinvestigation of fire accidents at coal mines, the gas to be analyzed isgathered by a person downhole of the coal mine. However, theinterference of background gas inside the pool may only be eliminated bythe person through gas blowing. As well, the gas inside the gas pool maybe very hard to be substituted by the gas to be analyzed, which mayproduce a great impact on the accuracy of the gas quantificationalanalysis result of the infrared spectrum method.

Recently, as for the infrared detection device for coal mine polar gasand a detection method for the same, the detection device may compriseBruker Tensor 27, Bruker ALPHA made in Germany, and Perkin ElmerSpectrum 100 made in the USA. The above-mentioned devices may bothcomprise a central processor, which can be electrically connected to apower supply, a light source, a detector, an alarm and indication lamp,an input and output module, a data collection and storage module. Thepower supply may also be electrically connected to a power supply switchand a power supply interface. The input and output module may also beconnected to a computer communication interface. The data collection andstorage module may also be electrically connected to the detector. Aswell, a detachable gas pool with a gas inlet and a gas outlet may beprovided between the light source and the detector. The method for thisinfrared detection device for coal mine polar gas with such structuremay comprise the following steps: firstly detaching the gas pool duringthe gas detection and filling N₂ gas of 99.999% content into the gaspool from the gas inlet; after replacing the gas in the gas pool,closing the gas outlet firstly and closing the gas inlet until thepressure is balanced; putting back the gas pool; scanning thespectrogram of the background gas until there is no gas peak value;during the hand sampling, connecting the gas bag filled with the gas tobe detected to the gas inlet, opening the gas inlet valve and thenopening the gas outlet valve; pressing the gas to be detected into thegas pool until the N₂ is completely discharged, closing the gas outletvalve and then the gas inlet valve; scanning the spectrogram of the gasto be detected so as to analyze the gas to be detected. Since there areblind angles at both ends inside the gas pool, the background air cannotbe thoroughly replaced by N₂ and then N₂ cannot be thoroughlydischarged, which render the spectrum of the gas to be detecteddistorted and the analysis of the gas to be detected inaccurate, thus,there are some risks of causing safety misadventure at the coal mine.Furthermore, in the method for this infrared detection device for coalmine polar gas with such structure, the gas pool has to be detached andis complicated to be used. Thus, there is a need for devices and methodsto analyze the above-mentioned gases in an effort to ensure continuousproduction within a mine and safety of mine workers.

SUMMARY

The present application discloses detection devices and methods toovercome or alleviate at least one aspect of the above mentioneddisadvantages in the current infrared detection device for coal minepolar gas. The disclosure includes an infrared detection device fordetecting coal mine polar gas, comprising: a central processor disposedwith an outer casing, the central processor being electrically connectedto a power supply, a light source, a detector, an alarm and indicationlamp, an input and output module, a data collection and storage module,the power supply also being electrically connected to a power supplyswitch and a power supply interface, the input and output module alsobeing connected to a computer communication interface, and the datacollection and storage module also being electrically connected to thedetector, and a gas pool assembly having a moveable optical window andfixed on the device is provided between the light source and thedetector.

In some embodiments, the gas pool assembly having a moveable opticalwindow can include: a stationary pool body having a gas inlet with a gasinlet valve, a stationary optical window being fixed at a front end ofthe stationary pool body by a protection cover for the stationaryoptical window, a rear stop cover being fixed at a rear end of thestationary pool body; and a moveable pool body inserted into thestationary pool body, a moveable optical window being fixed at a frontend of the moveable pool body by a protection cover for the moveableoptical window, a pull-and-push handle being provided at a rear end ofthe moveable pool body.

As well, the infrared detection device can further include a gas outlethaving a gas outlet valve coupled to the infrared detection device via amicro-air pump. The gas outlet can be located at the rear end of thestationary pool body. The protection cover for the moveable opticalwindow can be provided with a gas discharge groove.

The disclosure also includes an infrared detection device for detectingcoal mine polar gas, comprising: a central processor disposed within anouter casing, the central processor being electrically connected to apower supply, a light source, a detector, an alarm and indication lamp,an input and output module, a data collection and storage module, thepower supply also being electrically connected to a power supply switchand a power supply interface, the input and output module also beingconnected to a computer communication interface, and the data collectionand storage module also being electrically connected to the detector,and a gas pool assembly having a moveable optical window and fixed onthe device is provided between the light source and the detector.

In some embodiments, the gas pool assembly having a moveable opticalwindow comprises: a stationary pool body having a gas inlet with a gasinlet valve, a stationary optical window being fixed at a front end ofthe stationary pool body by a protection cover for the stationaryoptical window, a stopper being provided inside the stationary poolbody, a rear stop cover being fixed at a rear end of the stationary poolbody; and a moveable pool body inserted into the stationary pool body, amoveable optical window being fixed at a front end of the moveable poolbody by the protection cover for the moveable optical window, a stopblock being fixed at a rear end of the moveable pool body, aninside-pool stop sensor and an outside-pool stop sensor being fixed atboth sides of the rear stop cover, a rack having driving threads beingfixed at a bottom end of the moveable pool body, a rack position-controlgroove being provided at a bottom portion of the rear stop cover, adriving gear driven by a driving motor being provided at a bottom end ofthe gas pool, the central processor being electrically connected to theinside-pool stop sensor and the outside-pool stop sensor of the gas poolassembly having a moveable optical window, the central processor furtherbeing electrically connected to an electrical plug valve for gas inletand the driving motor.

In some embodiments, the infrared detection device further includes agas outlet having an electrical plug valve for gas outlet connected tothe device via a micro-air pump. The gas outlet can be located at therear end of the stationary pool body so as to continuously detect thegas. The central processor can be electrically connected to theelectrical plug valve for gas outlet.

The infrared detection device can further include a rear stop coverfixed to the stationary pool body by a snap-fit of an inward-projectionlock catch of a rear stop cover and an outward-projection lock catch ofthe stationary pool body. In some embodiments, the protection cover forthe moveable optical window is provided with a gas discharge groove.

The disclosure also includes an infrared detection device for detectingcoal mine polar gas, comprising: a central processor disposed within anouter casing, the central processor being electrically connected to apower supply, a light source, a detector, an alarm and indication lamp,an input and output module, a data collection and storage module, thepower supply also being electrically connected to a power supply switchand a power supply interface, the input and output module also beingconnected to a computer communication interface, and the data collectionand storage module also being electrically connected to the detector, agas pool assembly having a moveable optical window and fixed on thedevice is provided between the light source and the detector.

In some embodiments, the gas pool assembly having a moveable opticalwindow comprises: a stationary pool body having a gas inlet with anelectrical plug valve for gas inlet and a gas outlet with an electricalplug valve for gas outlet, a second electrical three-way valve and afirst electrical three-way valve being tube-connected between the gasinlet and the electrical plug valve for gas inlet, a third electricalthree-way valve, a micro-air pump and a fourth electrical three-wayvalve being tube-connected between the gas outlet and the electricalplug valve for gas outlet, the fourth electrical three-way valve beingtube-connected to the second electrical three-way valve, the firstelectrical three-way valve being tube-connected to the third electricalthree-way valve, a stationary optical window being fixed at a front endof the stationary pool body by a protection cover for the stationaryoptical window, a stopper and an inside-pool stop sensor as well as anoutside-pool stop sensor being provided inside the stationary pool body,a rear stop cover being fixed at a rear end of the stationary pool body,the protection cover for the moveable optical window for fixing amoveable optical window and a circular bracket thereon being placedinside the stationary pool body. As well, in some embodiments, theprotection cover for the moveable optical window is provided with a gasdischarge groove.

As well, the disclosure also includes a method of detecting coal minepolar gas using an infrared detection device comprising: a centralprocessor disposed with an outer casing, the central processor beingelectrically connected to a power supply, a light source, a detector, analarm and indication lamp, an input and output module, a data collectionand storage module, the power supply also being electrically connectedto a power supply switch and a power supply interface, the input andoutput module also being connected to a computer communicationinterface, and the data collection and storage module also beingelectrically connected to the detector, and a gas pool assembly having amoveable optical window and fixed on the device is provided between thelight source and the detector.

In some embodiments, the gas pool assembly having a moveable opticalwindow comprises: a stationary pool body having a gas inlet with a gasinlet valve, a stationary optical window being fixed at a front end ofthe stationary pool body by a protection cover for the stationaryoptical window, a rear stop cover being fixed at a rear end of thestationary pool body; and a moveable pool body inserted into thestationary pool body, a moveable optical window being fixed at a frontend of the moveable pool body by a protection cover for the moveableoptical window, a pull-and-push handle being provided at a rear end ofthe moveable pool body.

Methods can include, during a period of hand sampling for detecting:opening a gas inlet valve and pushing a pull-and-push handle until aprotection cover for the moveable optical window comes into contact witha stationary optical window. After connecting a gas bag filled with gasto be detected to a gas inlet, methods can include pulling thepull-and-push handle until the protection cover for the moveable opticalwindow comes into contact with a rear stop cover so as to at leastpartially fill the stationary pool body with the gas to be detected. Aswell, methods can include closing the gas inlet valve and scanningspectrum of the gas to be detected so as to analyze the gas to bedetected.

Even still, the disclosure includes a method for detecting coal minepolar gas using an infrared detection device comprising: a centralprocessor disposed with an outer casing, the central processor beingelectrically connected to a power supply, a light source, a detector, analarm and indication lamp, an input and output module, a data collectionand storage module, the power supply also being electrically connectedto a power supply switch and a power supply interface, the input andoutput module also being connected to a computer communicationinterface, and the data collection and storage module also beingelectrically connected to the detector, and a gas pool assembly having amoveable optical window and fixed on the device is provided between thelight source and the detector.

In some embodiments, the gas pool assembly having a moveable opticalwindow comprises: a stationary pool body having a gas inlet with a gasinlet valve, a stationary optical window being fixed at a front end ofthe stationary pool body by a protection cover for the stationaryoptical window, a rear stop cover being fixed at a rear end of thestationary pool body; and a moveable pool body inserted into thestationary pool body, a moveable optical window being fixed at a frontend of the moveable pool body by a protection cover for the moveableoptical window, a pull-and-push handle being provided at a rear end ofthe moveable pool body; the infrared detection device comprising a gasoutlet having a gas outlet valve coupled to the infrared detectiondevice via a micro-air pump, wherein the gas outlet is located at therear end of the stationary pool body.

Methods can include, during a period of continuous sampling: pumping outgas in lines using a micro-air pump until the lines are at leastpartially filled by gas to be detected; closing valves in the lines;opening a gas inlet valve; and pushing a pull-and-push handle until aprotection cover for the moveable optical window comes into contact witha stationary optical window. After connecting the lines for gas to bedetected to a gas inlet, methods can include opening valves in thelines; pulling the pull-and-push handle until the protection cover forthe moveable optical window comes into contact with a rear stop cover soas to at least partially fill the stationary pool body with the gas tobe detected; opening a gas outlet valve; and continuously pumping andcirculating the gas to be detected using the micro-air pump andcontinuously scanning spectrum of the gas to be detected so as toanalyze the gas to be detected.

Furthermore, the disclosure includes a method for detecting coal minepolar gas using an infrared detection device, comprising: a centralprocessor disposed within an outer casing, the central processor beingelectrically connected to a power supply, a light source, a detector, analarm and indication lamp, an input and output module, a data collectionand storage module, the power supply also being electrically connectedto a power supply switch and a power supply interface, the input andoutput module also being connected to a computer communicationinterface, and the data collection and storage module also beingelectrically connected to the detector, and a gas pool assembly having amoveable optical window and fixed on the device is provided between thelight source and the detector.

In some embodiments, the gas pool assembly having a moveable opticalwindow comprises: a stationary pool body having a gas inlet with a gasinlet valve, a stationary optical window being fixed at a front end ofthe stationary pool body by a protection cover for the stationaryoptical window, a stopper being provided inside the stationary poolbody, a rear stop cover being fixed at a rear end of the stationary poolbody; and a moveable pool body inserted into the stationary pool body, amoveable optical window being fixed at a front end of the moveable poolbody by a protection cover for the moveable optical window, a stop blockbeing fixed at a rear end of the moveable pool body, an inside-pool stopsensor and an outside-pool stop sensor being fixed at both sides of therear stop cover, a rack having driving threads being fixed at a bottomend of the moveable pool body, a rack position-control groove beingprovided at a bottom portion of the rear stop cover, a driving geardriven by a driving motor being provided at a bottom end of the gaspool, the central processor being electrically connected to theinside-pool stop sensor and the outside-pool stop sensor of the gas poolassembly having a moveable optical window, the central processor furtherbeing electrically connected to an electrical plug valve for gas inletand the driving motor.

Methods can include, during a period of hand sampling for detecting:causing, by a computer connected with a computer communicationinterface, an electrical plug valve for gas inlet to open and causing adriving motor to start; and pushing, by the driving motor, a moveablepool body until a stop block fixed at rear end of the moveable pool bodycontacts an outside-pool stop sensor. After connecting a gas bag filledwith gas to be detected to a gas inlet, methods can include reversingthe driving motor such that the driving motor works to pull the moveablepool body until a protection cover for the moveable optical window comesinto contact with an inside-pool stop sensor so as to at least partiallyfill the stationary pool body with the gas to be detected; and closingthe electrical plug valve for gas inlet and scanning spectrum of the gasto be detected so as to analyze the gas to be detected.

The disclosure also includes a method for detecting coal mine polar gasusing an infrared detection device, comprising: a central processordisposed within an outer casing, the central processor beingelectrically connected to a power supply, a light source, a detector, analarm and indication lamp, an input and output module, a data collectionand storage module, the power supply also being electrically connectedto a power supply switch and a power supply interface, the input andoutput module also being connected to a computer communicationinterface, and the data collection and storage module also beingelectrically connected to the detector, and a gas pool assembly having amoveable optical window and fixed on the device is provided between thelight source and the detector. In some embodiments, the gas poolassembly having a moveable optical window comprises: a stationary poolbody having a gas inlet with a gas inlet valve, a stationary opticalwindow being fixed at a front end of the stationary pool body by aprotection cover for the stationary optical window, a stopper beingprovided inside the stationary pool body, a rear stop cover being fixedat a rear end of the stationary pool body; and a moveable pool bodyinserted into the stationary pool body, a moveable optical window beingfixed at a front end of the moveable pool body by a protection cover forthe moveable optical window, a stop block being fixed at a rear end ofthe moveable pool body, an inside-pool stop sensor and an outside-poolstop sensor being fixed at both sides of the rear stop cover, a rackhaving driving threads being fixed at a bottom end of the moveable poolbody, a rack position-control groove being provided at a bottom portionof the rear stop cover, a driving gear driven by a driving motor beingprovided at a bottom end of the gas pool.

In some embodiments, the central processor is electrically connected tothe inside-pool stop sensor and the outside-pool stop sensor of the gaspool assembly having a moveable optical window. The central processorcan also be electrically connected to an electrical plug valve for gasinlet and the driving motor. The infrared detection device can alsocomprise a gas outlet having an electrical plug valve for gas outletconnected to the device via a micro-air pump. The gas outlet can belocated at the rear end of the stationary pool body so as tocontinuously detect the gas. The central processor can be electricallyconnected to the electrical plug valve for gas outlet.

Methods can include, during a period of continuous sampling: pumping outgas in lines using a micro-air pump until the lines are at leastpartially filled by gas to be detected; closing valves in the lines;causing, by a computer connected with a computer communicationinterface, an electrical plug valve for gas inlet to open and causing adriving motor to start; and pushing, by the driving motor, a moveablepool body until a stop block fixed at rear end of the moveable pool bodycontacts an outside-pool stop sensor. After connecting the lines for gasto be detected to a gas inlet, methods can include opening valves in thelines; pulling, by the driving motor, the moveable pool body until theprotection cover for the moveable optical window comes into contact withan inside-pool stop sensor so as to at least partially fill thestationary pool body with the gas to be detected; opening an electricalplug valve for gas outlet; and continuously pumping and circulating thegas to be detected using the micro-air pump and continuously scanningspectrum of the gas to be detected so as to analyze the gas.

Even still, the disclosure includes a method for detecting coal minepolar gas using an infrared detection device for detecting coal minepolar gas, comprising: a central processor disposed within an outercasing, the central processor being electrically connected to a powersupply, a light source, a detector, an alarm and indication lamp, aninput and output module, a data collection and storage module, the powersupply also being electrically connected to a power supply switch and apower supply interface, the input and output module also being connectedto a computer communication interface, and the data collection andstorage module also being electrically connected to the detector, a gaspool assembly having a moveable optical window and fixed on the deviceis provided between the light source and the detector.

In some embodiments, the gas pool assembly having a moveable opticalwindow comprises: a stationary pool body having a gas inlet with anelectrical plug valve for gas inlet and a gas outlet with an electricalplug valve for gas outlet, a second electrical three-way valve and afirst electrical three-way valve being tube-connected between the gasinlet and the electrical plug valve for gas inlet, a third electricalthree-way valve, a micro-air pump and a fourth electrical three-wayvalve being tube-connected between the gas outlet and the electricalplug valve for gas outlet, the fourth electrical three-way valve beingtube-connected to the second electrical three-way valve, the firstelectrical three-way valve being tube-connected to the third electricalthree-way valve, a stationary optical window being fixed at a front endof the stationary pool body by a protection cover for the stationaryoptical window, a stopper and an inside-pool stop sensor as well as anoutside-pool stop sensor being provided inside the stationary pool body,a rear stop cover being fixed at a rear end of the stationary pool body,a protection cover for the moveable optical window for fixing a moveableoptical window and a circular bracket thereon being placed inside thestationary pool body.

Methods can include, during a period of hand sampling for detecting:causing, by a computer connected with a computer communicationinterface, an electrical plug valve for gas inlet to open andsequentially open a second electrical three-way valve, a firstelectrical three-way valve, a third electrical three-way valve and afourth electrical three-way valve in lines and then start a micro-airpump. Methods can also include pumping out gas inside a stationary poolbody until a protection cover for the moveable optical window contactsan inside-pool front end stop sensor. After connecting a gas bag filledwith gas to be detected to a gas inlet, methods can include causing, bythe computer connected with a computer communication interface, tosequentially open a first electrical three-way valve, a third electricalthree-way valve, a fourth electrical three-way valve and a secondelectrical three-way valve in lines and start the micro-air pump;pumping gas to be detected into the stationary pool body until theprotection cover for the moveable optical window contacts an inside-poolrear end stop sensor so as to at least partially fill the stationarypool body with the gas to be detected; and closing the electrical plugvalve for gas inlet and scanning spectrum of the gas to be detected soas to analyze the gas.

As well, during a period of continuous sampling, methods can include:pumping out gas in lines using a micro-air pump until the lines are atleast partially filled by gas to be detected; closing valves in thelines; and causing, by a computer connected with a computercommunication interface, an electrical plug valve for gas inlet to openand sequentially open a second electrical three-way valve, a firstelectrical three-way valve, a third electrical three-way valve and afourth electrical three-way valve in lines and then to start a micro-airpump. Methods can include pumping out gas inside a stationary pool bodyuntil a protection cover for the moveable optical window comes intocontact with an inside-pool front end stop sensor. After connecting thelines for gas to be detected to a gas inlet, methods can include:opening the valves in the lines, methods can include causing, by acomputer connected with a computer communication interface, tosequentially open a first electrical three-way valve, a third electricalthree-way valve, a fourth electrical three-way valve, and a secondelectrical three-way valve in lines and to start the micro-air pump.Methods can also include: pumping gas to be detected into the stationarypool body until the protection cover for the moveable optical windowcomes into contact with an inside-pool rear end stop sensor so as to atleast partially fill the stationary pool body with the gas to bedetected; opening an electrical plug valve for gas outlet; andcontinuously pumping and circulating the gas to be detected using themicro-air pump and continuously scanning spectrum of the gas to bedetected so as to analyze the gas to be detected.

Some advantages of the present invention can be: a gas pool assemblyhaving moveable optical window are fixed on the device and providedbetween the light source and the detector of the infrared detectiondevice for coal mine polar gas, such that there is provided a structureto manually or automatically clean the gas in a gas pool in the mannerof vacuum. In combination with the method for detecting coal mine polargas using the infrared detection device for coal mine polar gas, thefunction of manually or automatically cleaning the gas in a gas pool inthe manner of vacuum is realized, thereby may save N₂ gas used forcleaning, may reduce the cost of cleaning gas, may simplify the processof cleaning gas, may eliminate the error caused by the person, mayensure the reality of the spectrum of gas to be detected, may ensure theaccuracy of the analysis for gas to be detected. Thus, it can providereliable evidence for forecasting the fire disaster and conducting therescue. The present invention is also applicable to other industrialfields.

The embodiments described above include many optional features andaspects. Features and aspects of the embodiments can be combined.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages are described belowwith reference to the drawings, which are intended to illustrate, butnot to limit, the invention. In the drawings, like reference charactersdenote corresponding features consistently throughout similarembodiments. The above and other features of the present invention willbecome more apparent by describing in detail exemplary embodimentsthereof with reference to the accompanying drawings, in which:

FIG. 1 is a structural schematic view of the present invention;

FIG. 2 is a structural schematic view of a first embodiment of thepresent invention;

FIG. 3 is a structural schematic view of a second embodiment of thepresent invention;

FIG. 4 is a structural schematic view of a third embodiment of thepresent invention;

FIG. 5 is a structural schematic view of a fourth embodiment of thepresent invention;

FIG. 6 is a structural schematic view of a fifth embodiment of thepresent invention;

FIG. 7 is a local structural schematic view of FIG. 4 or FIG. 5 of thepresent invention;

FIG. 8 is a cross-section view of the local structural schematic view ofFIG. 4 or FIG. 5 of the present invention; and

FIGS. 9, 10, 11 a, and 11 b depict flow diagrams showing methods ofoperating infrared detection devices, according to some embodiments.

DETAILED DESCRIPTION

Although certain embodiments and examples are disclosed below, inventivesubject matter extends beyond the specifically disclosed embodiments toother alternative embodiments and/or uses, and to modifications andequivalents thereof. Thus, the scope of the claims appended hereto isnot limited by any of the particular embodiments described below. Forexample, in any method or process disclosed herein, the acts oroperations of the method or process may be performed in any suitablesequence and are not necessarily limited to any particular disclosedsequence. Various operations may be described as multiple discreteoperations in turn, in a manner that may be helpful in understandingcertain embodiments; however, the order of description should not beconstrued to imply that these operations are order dependent.Additionally, the structures, systems, and/or devices described hereinmay be embodied as integrated components or as separate components.

For purposes of comparing various embodiments, certain aspects andadvantages of these embodiments are described. Not necessarily all suchaspects or advantages are achieved by any particular embodiment. Thus,for example, various embodiments may be carried out in a manner thatachieves or optimizes one advantage or group of advantages as taughtherein without necessarily achieving other aspects or advantages as mayalso be taught or suggested herein.

LIST OF REFERENCE NUMERALS

-   2—Power supply-   3—Central processor-   4—Light source-   5—Gas pool assembly with a moveable optical window-   6—Detector-   7—Data collection and storage module-   8—Input and output module-   9—Alarm and indication lamp-   10—Computer communication interface-   11—Power supply switch-   12—Power supply interface-   20—Stationary pool body-   21—Stationary optical window-   22—Protection cover for stationary optical window-   23—Gas inlet-   24—Gas outlet-   25—Electrical plug valve (stopcock) for gas inlet-   26—Micro-air pump-   27—Moveable optical window-   28—Moveable pool body-   29—Pull-and-push handle-   30—Stopper-   31—Driving motor-   32—Driving gear-   33—Driving threads-   34—Inside-pool stop sensor-   35—Fourth electrical three-way valve-   36—Rack position-control groove-   38—Circular bracket-   134—Front end stop sensor-   211—Rear stop cover-   212—Protection cover for moveable optical window-   250—Gas inlet valve-   251—Electrical plug valve (stopcock) for gas outlet-   300—Gas discharge groove-   341—Outside-pool stop sensor-   342—Stop block-   351—First electrical three-way valve-   352—Second electrical three-way valve-   353—Third electrical three-way valve-   400—Inward-projection lock catch of rear stop cover-   401—Outward-projection lock catch of stationary pool body-   1341—Rear end stop sensor-   2501—Gas outlet valve

Infrared Detection Device Embodiments

Referring to FIGS. 1 and 2, an infrared detection device for detectingcoal mine polar gas can comprise a central processor 3 located within anouter casing. The central processor 3 can also be electrically connectedto a power supply 2, a light source 4, a detector 6, an alarm andindication lamp 9, an input and output module 8, a data collection andstorage module 7. The power supply 2 can also be electrically connectedto a power supply switch 11 and a power supply interface 12. Moreover,the input and output module 8 can also be connected to a computercommunication interface 10, and the data collection and storage module 7can also be electrically connected to the detector 6.

A gas pool assembly 5 can have a moveable optical window providedbetween the light source 4 and the detector 6. Accordingly, the gas poolassembly 5 can have a moveable optical window that can comprise: astationary pool body 20 having a gas inlet 23 with a gas inlet valve250, a stationary optical window 21 being fixed at a front end of thestationary pool body 20 by a protection cover for the stationary opticalwindow 22, and a rear stop cover 211 being fixed at a rear end of thestationary pool body 20. As well, the gas pool assembly 5 can have amoveable pool body 28 inserted into the stationary pool body 20, amoveable optical window 27 being fixed at a front end of the moveablepool body 28 by a protection cover for the moveable optical window 212,a pull-and-push handle 29 being provided at a rear end of the moveablepool body 28. As well, the protection cover for the moveable opticalwindow 212 can be provided with a gas discharge groove 300.

Referring now to FIGS. 1 and 3, an infrared detection device fordetecting coal mine polar gas can comprise a central processor 3 locatedwithin an outer casing. The central processor 3 can be electricallyconnected to a power supply 2, a light source 4, a detector 6, an alarmand indication lamp 9, an input and output module 8, a data collectionand storage module 7. As well, the power supply 2 can also beelectrically connected to a power supply switch 11 and a power supplyinterface 12. Even still, the input and output module 8 can also beconnected to a computer communication interface 10. Furthermore, thedata collection and storage module 7 can also be electrically connectedto the detector 6.

A gas pool assembly 5 can have a moveable optical window and fixed onthe device can be provided between the light source 4 and the detector6. Accordingly, the gas pool assembly 5 can have a moveable opticalwindow that can comprise: a stationary pool body 20 having a gas inlet23 with a gas inlet valve 250, a stationary optical window 21 beingfixed at a front end of the stationary pool body 20 by a protectioncover for the stationary optical window 22, and a rear stop cover 211being fixed at a rear end of the stationary pool body 20. As well, thegas pool assembly 5 can include a moveable pool body 28 inserted intothe stationary pool body 20, a moveable optical window 27 being fixed ata front end of the moveable pool body 28 by a protection cover for themoveable optical window 212, and a pull-and-push handle 29 beingprovided at a rear end of the moveable pool body 28.

A gas outlet 24 having a gas outlet valve 2501 connected thereto via amicro-air pump 26 can be provided at the rear end of the stationary poolbody 20 so as to continuously detect the gas to be detected. As well,the protection cover for the moveable optical window 212 can be providedwith a gas discharge groove 300.

With reference to FIGS. 1, 4, 7 and 8, an infrared detection device forcoal mine polar gas can include a central processor 3 located within anouter casing. The central processor 3 can be electrically connected to apower supply 2, a light source 4, a detector 6, an alarm and indicationlamp 9, and an input and output module 8, a data collection and storagemodule 7. The power supply 2 can also be electrically connected to apower supply switch 11 and a power supply interface 12. As well, theinput and output module 8 can also be connected to a computercommunication interface 10. The data collection and storage module 7 canalso be electrically connected to the detector 6.

A gas pool assembly 5 can have a moveable optical window and fixed onthe device can be provided between the light source 4 and the detector6. Accordingly, the gas pool assembly 5 can have a moveable opticalwindow that can comprise: a stationary pool body 20 having a gas inlet23 with a gas inlet valve 250, a stationary optical window 21 beingfixed at a front end of the stationary pool body 20 by a protectioncover for the stationary optical window 22, a stopper 30 being providedinside the stationary pool body 20, and a rear stop cover 211 beingfixed at a rear end of the stationary pool body 20. The gas poolassembly 5 can include a moveable pool body 28 inserted into thestationary pool body 20, a moveable optical window 27 being fixed at afront end of the moveable pool body 28 by a protection cover for themoveable optical window 212, a stop block 342 being fixed at a rear endof the moveable pool body 28, an inside-pool stop sensor 34 and anoutside-pool stop sensor 341 being fixed at both sides of the rear stopcover 211, a rack having driving threads 33 being fixed at a bottom endof the moveable pool body 28, a rack position-control groove 36 beingprovided at a bottom portion of the rear stop cover 211, and a drivinggear 32 driven by a driving motor 31 being provided at a bottom end ofthe gas pool. The central processor 3 can be electrically connected tothe inside-pool stop sensor 34 and the outside-pool stop sensor 341 ofthe gas pool assembly 5 having a moveable optical window. As well, thecentral processor 3 can be electrically connected to the electrical plugvalve for gas inlet 25 and the driving motor 31.

The infrared detection device can include a rear stop cover 211 fixed atthe stationary pool body 20 by the snap-fit of an inward-projection lockcatch of rear stop cover 400 and an outward-projection lock catch ofstationary pool body 40. The protection cover for the moveable opticalwindow 212 can be provided with a gas discharge groove 300.

Now referring to FIGS. 1, 5, 7 and 8, an infrared detection device forcoal mine polar gas can comprise a central processor 3 located within anouter casing. The central processor 3 can be electrically connected to apower supply 2, a light source 4, a detector 6, an alarm and indicationlamp 9, an input and output module 8, and a data collection and storagemodule 7. The power supply 2 can also be electrically connected to apower supply switch 11 and a power supply interface 12. As well, theinput and output module 8 can also be connected to a computercommunication interface 10. The data collection and storage module 7 canalso be electrically connected to the detector 6.

A gas pool assembly 5 can have a moveable optical window providedbetween the light source 4 and the detector 6. The gas pool assembly 5having the moveable optical window can include a stationary pool body 20having a gas inlet 23 with a gas inlet valve 250, a stationary opticalwindow 21 being fixed at a front end of the stationary pool body 20 by aprotection cover for the stationary optical window 22, a stopper 30being provided inside the stationary pool body 20, a rear stop cover 211being fixed at a rear end of the stationary pool body 20; and a moveablepool body 28 inserted into the stationary pool body 20. As well, themoveable optical window 27 can be fixed at a front end of the moveablepool body 28 by a protection cover for the moveable optical window 212.The gas pool assembly 5 can include a stop block 342 being fixed at arear end of the moveable pool body 28, an inside-pool stop sensor 34 andan outside-pool stop sensor 341 being fixed at both sides of the rearstop cover 211, a rack having driving threads 33 being fixed at a bottomend of the moveable pool body 28, a rack position-control groove 36being provided at a bottom portion of the rear stop cover 211, a drivinggear 32 driven by a driving motor 31 being provided at a bottom end ofthe gas pool, the central processor 3 being electrically connected tothe inside-pool stop sensor 34, the outside-pool stop sensor 341 of thegas pool assembly 5 having a moveable optical window. The centralprocessor 3 can be electrically connected to the electrical plug valvefor gas inlet 25 and the driving motor 31.

In such embodiments, a gas outlet 24 having an electrical plug valve forgas outlet 251 can be connected thereto via a micro-air pump 26 providedat the rear end of the stationary pool body 20 so as to continuouslydetect the gas to be detected. As well, the central processor 3 can beelectrically connected to the electrical plug valve for gas outlet 251.A rear stop cover 211 can be fixed at the stationary pool body 20 by thesnap-fit of an inward-projection lock catch of rear stop cover 400 andan outward-projection lock catch of stationary pool body 401. Theprotection cover for the moveable optical window 212 can be providedwith a gas discharge groove 300.

FIGS. 1 and 6 illustrate an infrared detection device for coal minepolar gas, comprising: a central processor 3 inside an outer casing, thecentral processor 3 being electrically connected to a power supply 2, alight source 4, a detector 6, an alarm and indication lamp 9, an inputand output module 8, a data collection and storage module 7, the powersupply 2 also being electrically connected to a power supply switch 11and a power supply interface 12, the input and output module 8 alsobeing connected to a computer communication interface 10, and the datacollection and storage module 7 also being electrically connected to thedetector 6. The infrared detection device can also include a gas poolassembly 5 having a moveable optical window. The gas pool assembly 5 canbe fixed on the infrared detection device between the light source 4 andthe detector 6.

In such embodiments, the gas pool assembly 5 having a moveable opticalwindow comprises: a stationary pool body 20 having a gas inlet 23 withan electrical plug valve for gas inlet 25 and a gas outlet 24 with anelectrical plug valve for gas outlet 251, a second electrical three-wayvalve 352 and a first electrical three-way valve 351 beingtube-connected between the gas inlet 23 and the electrical plug valvefor gas inlet 25, a third electrical three-way valve 353, a micro-airpump 26 and a fourth electrical three-way valve 35 being tube-connectedbetween the gas outlet 24 and the electrical plug valve for gas outlet251. The fourth electrical three-way valve 35 can be tube-connected tothe second electrical three-way valve 352. The first electricalthree-way valve 351 can be tube-connected to the third electricalthree-way valve 353.

As well, the infrared detection device can include a stationary opticalwindow 21 fixed at a front end of the stationary pool body 20 by aprotection cover for the stationary optical window 22, a stopper 30 andan inside-pool stop sensor 34 as well as an outside-pool stop sensor 341being provided inside the stationary pool body 20, a rear stop cover 211being fixed at a rear end of the stationary pool body 20, a protectioncover for the moveable optical window 212 for fixing a moveable opticalwindow 27 and a circular bracket 38 thereon being placed inside thestationary pool body 20. In such embodiments, the protection cover forthe moveable optical window 212 can be provided with a gas dischargegroove 300.

Methods of Detecting Coal Mine Polar Gas

FIGS. 1, 2 and 3 illustrate an infrared detection device that can beused for detecting coal mine polar gas. As further shown in FIG. 9,during a period of hand sampling for detecting, methods can includeopening a gas inlet valve 250 (at step 900); and pushing a pull-and-pushhandle 29 until a protection cover for the moveable optical window 212comes into contact with a stationary optical window 21 (at step 902).After connecting a gas bag filled with gas to be detected to a gas inlet23, methods can include pulling the pull-and-push handle 29 until theprotection cover for the moveable optical window 212 comes into contactwith a rear stop cover 211 so as to at least partially fill thestationary pool body 20 with the gas to be detected (at step 904). Afterconnecting a gas bag filled with gas to be detected to a gas inlet 23,methods can include pulling the pull-and-push handle 29 until theprotection cover for the moveable optical window 212 comes into contactwith a rear stop cover 211 so as to fully fill the stationary pool body20 with the gas to be detected.

Methods can also include closing the gas inlet valve 250 and scanning aspectrum of the gas to be detected so as to analyze the gas to bedetected (at step 906). During a period of continuous sampling, methodscan include pumping out gas in lines using a micro-air pump until thelines are at least partially filled by gas to be detected (at step 908).Some methods can include pumping out gas in lines using a micro-air pumpuntil the lines are fully filled by gas to be detected.

Methods can also include closing valves in the lines (at step 910);opening a gas inlet valve 250 (at step 912); and pushing a pull-and-pushhandle 29 until a protection cover for the moveable optical window 212comes into contact with a stationary optical window 21 (at step 914).After connecting the lines for gas to be detected to a gas inlet 23,methods can include opening valves in the lines (at step 916); pullingthe pull-and-push handle 29 until the protection cover for the moveableoptical window 212 comes into contact with a rear stop cover 211 so asto at least partially fill the stationary pool body 20 with the gas tobe detected (at step 918). Methods can also include pulling thepull-and-push handle 29 until the protection cover for the moveableoptical window 212 comes into contact with a rear stop cover 211 so asto fully fill the stationary pool body 20 with the gas to be detected.

Even still, methods can include opening a gas outlet valve 2501 (at step920). As well, some methods can include continuously pumping andcirculating the gas to be detected using the micro-air pump 26 andcontinuously scanning spectrum of the gas to be detected so as toanalyze the gas to be detected (at step 922).

Referring now to FIGS. 1, 4 and 5, a method for detecting coal minepolar gas using an infrared detection device for detecting coal minepolar gas can include, causing, by a computer connected with a computercommunication interface 10, to open an electrical plug valve for gasinlet 25 and to start a driving motor 31 (at step 1000). Methods canalso include pushing, by a driving motor 31, a moveable pool body 28until a stop block 342 fixed at a rear end of the moveable pool body 28contacts an outside-pool stop sensor 341 (at step 1002). It should beappreciated that the steps can occur during a period of hand samplingfor detecting.

After connecting a gas bag filled with gas to be detected to a gas inlet23, methods can include giving commands to reverse the driving motor 31such that the driving motor 31 pulls the moveable pool body 28 until aprotection cover for the moveable optical window 212 comes into contactwith an inside-pool stop sensor 34 so as to at least partially fill thestationary pool body 20 with the gas to be detected (at step 1004).After connecting a gas bag filled with gas to be detected to a gas inlet23, methods can include giving commands to reverse the driving motor 31such that the driving motor 31 works to pull the moveable pool body 28until a protection cover for the moveable optical window 212 comes intocontact with an inside-pool stop sensor 34 so as to fully fill thestationary pool body 20 with the gas to be detected.

Methods can also include closing the electrical plug valve for gas inlet25 and scanning spectrum of the gas to be detected so as to analyze thegas to be detected (at step 1006). During a period of continuoussampling, methods can include pumping out gas into lines using amicro-air pump until the lines are at least partially filled by gas tobe detected (at step 1008). Methods can also include pumping out gasinto lines using a micro-air pump until the lines are fully filled bygas to be detected.

Even still, methods can include closing valves in the lines (at step1010); causing, by a computer connected with a computer communicationinterface 10, to open an electrical plug valve for gas inlet 25 and tostart a driving motor 31 (at step 1012). As well, methods can includepushing, by the driving motor 31, a moveable pool body 28 until a stopblock 342 fixed at a rear end of the moveable pool body 28 contacts anoutside-pool stop sensor 341 (at step 1014).

After connecting the lines for gas to be detected to a gas inlet 23,methods can include opening valves in the lines (at step 1016). In somemethods, the driving motor 31 can pull the moveable pool body 28 untilthe protection cover for the moveable optical window 212 comes intocontact with an inside-pool stop sensor 34 so as to at least partiallyfill the stationary pool body 20 with the gas to be detected (at step1018). In some methods, the driving motor 31 works to pull the moveablepool body 28 until the protection cover for the moveable optical window212 comes into contact with an inside-pool stop sensor 34 so as to fullyfill the stationary pool body 20 with the gas to be detected.

Methods can also include opening an electrical plug valve for gas outlet251 (at step 1020). Even still, some methods can include continuouslypumping and circulating the gas to be detected using the micro-air pump26 and continuously scanning spectrum of the gas to be detected so as toanalyze the gas to be detected (at step 1022).

Referring now to FIGS. 1 and 6, a method for detecting coal mine polargas using an infrared detection device for detecting coal mine polar gascan include, during a period of hand sampling for detecting, causing, bya computer connected with a computer communication interface 10, to openan electrical plug valve for gas inlet 25 and sequentially open a secondelectrical three-way valve 352, a first electrical three-way valve 351,a third electrical three-way valve 353 and a fourth electrical three-wayvalve 35 in lines and then to start a micro-air pump 26 (at step 1100).Methods can also include pumping out gas inside a stationary pool body20 until a protection cover for the moveable optical window 212 comesinto contact with an inside-pool front end stop sensor 134 (at step1102).

After connecting a gas bag filled with gas to be detected to a gas inlet23, methods can include causing, by the computer connected with acomputer communication interface 10, to sequentially open a firstelectrical three-way valve 351, a third electrical three-way valve 353,a fourth electrical three-way valve 35 and a second electrical three-wayvalve 352 in lines and to start the micro-air pump 26 (at step 1104).Methods can also include pumping gas to be detected into the stationarypool body 20 until the protection cover for the moveable optical window212 contacts an inside-pool rear end stop sensor 1341 so as to at leastpartially fill the stationary pool body 20 with the gas to be detected(at step 1106). Methods can include pumping gas to be detected into thestationary pool body 20 until the protection cover for the moveableoptical window 212 comes into contact with an inside-pool rear end stopsensor 1341 so as to fully fill the stationary pool body 20 with the gasto be detected.

Some methods include closing the electrical plug valve for gas inlet 25and scanning spectrum of the gas to be detected so as to analyze the gasto be detected (at step 1108). During a period of continuous sampling,methods can include pumping out gas into lines using a micro-air pumpuntil the lines are at least partially filled by gas to be detected (atstep 1110). Methods can include pumping out gas into lines using amicro-air pump until the lines are fully filled by gas to be detected.

Methods can include closing valves in the lines (at step 1112) andcausing, by a computer connected with a computer communication interface10, to open an electrical plug valve for gas inlet 25 and sequentiallyopen a second electrical three-way valve 352, a first electricalthree-way valve 351, a third electrical three-way valve 353 and a fourthelectrical three-way valve 35 in lines and then to start a micro-airpump 26 (at step 1114).

Methods may even include pumping out gas inside a stationary pool body20 until a protection cover for the moveable optical window 212 contactsan inside-pool front end stop sensor 134 (at step 1116). Afterconnecting the lines for gas to be detected to a gas inlet 23, methodscan include opening the valves in the lines (at step 1118) and causing,by a computer connected with a computer communication interface 10, tosequentially open a first electrical three-way valve 351, a thirdelectrical three-way valve 353, a fourth electrical three-way valve 35and a second electrical three-way valve 352 in lines and to start themicro-air pump 26 (at step 1120).

Methods can include pumping gas to be detected into the stationary poolbody 20 until the protection cover for the moveable optical window 212contacts an inside-pool rear end stop sensor 1341 so as to at leastpartially fill the stationary pool body 20 with the gas to be detected(at step 1122). Methods can include pumping gas to be detected into thestationary pool body 20 until the protection cover for the moveableoptical window 212 contacts an inside-pool rear end stop sensor 1341 soas to fully fill the stationary pool body 20 with the gas to bedetected.

As well, some methods can include opening an electrical plug valve forgas outlet 251 (at step 1124). Even still, some methods can includecontinuously pumping and circulating the gas to be detected using themicro-air pump 26 and continuously scanning spectrum of the gas to bedetected so as to analyze the gas to be detected (at step 1126).

Interpretation

None of the steps described herein is essential or indispensable. Any ofthe steps can be adjusted or modified. Other or additional steps can beused. Any portion of any of the steps, processes, structures, and/ordevices disclosed or illustrated in one embodiment, flowchart, orexample in this specification can be combined or used with or instead ofany other portion of any of the steps, processes, structures, and/ordevices disclosed or illustrated in a different embodiment, flowchart,or example. The embodiments and examples provided herein are notintended to be discrete and separate from each other.

The section headings and subheadings provided herein are nonlimiting.The section headings and subheadings do not represent or limit the fullscope of the embodiments described in the sections to which the headingsand subheadings pertain. For example, a section titled “Topic 1” mayinclude embodiments that do not pertain to Topic 1 and embodimentsdescribed in other sections may apply to and be combined withembodiments described within the “Topic 1” section.

Some of the devices, systems, embodiments, and processes use computers.Each of the routines, processes, methods, and algorithms described inthe preceding sections may be embodied in, and fully or partiallyautomated by, code modules executed by one or more computers, computerprocessors, or machines configured to execute computer instructions. Thecode modules may be stored on any type of non-transitorycomputer-readable storage medium or tangible computer storage device,such as hard drives, solid state memory, flash memory, optical disc,and/or the like. The processes and algorithms may be implementedpartially or wholly in application-specific circuitry. The results ofthe disclosed processes and process steps may be stored, persistently orotherwise, in any type of non-transitory computer storage such as, e.g.,volatile or non-volatile storage.

The various features and processes described above may be usedindependently of one another, or may be combined in various ways. Allpossible combinations and subcombinations are intended to fall withinthe scope of this disclosure. In addition, certain method, event, state,or process blocks may be omitted in some implementations. The methods,steps, and processes described herein are also not limited to anyparticular sequence, and the blocks, steps, or states relating theretocan be performed in other sequences that are appropriate. For example,described tasks or events may be performed in an order other than theorder specifically disclosed. Multiple steps may be combined in a singleblock or state. The example tasks or events may be performed in serial,in parallel, or in some other manner. Tasks or events may be added to orremoved from the disclosed example embodiments. The example systems andcomponents described herein may be configured differently thandescribed. For example, elements may be added to, removed from, orrearranged compared to the disclosed example embodiments.

Conditional language used herein, such as, among others, “can,” “could,”“might,” “may,” “e.g.,” and the like, unless specifically statedotherwise, or otherwise understood within the context as used, isgenerally intended to convey that certain embodiments include, whileother embodiments do not include, certain features, elements and/orsteps. Thus, such conditional language is not generally intended toimply that features, elements and/or steps are in any way required forone or more embodiments or that one or more embodiments necessarilyinclude logic for deciding, with or without author input or prompting,whether these features, elements and/or steps are included or are to beperformed in any particular embodiment. The terms “comprising,”“including,” “having,” and the like are synonymous and are usedinclusively, in an open-ended fashion, and do not exclude additionalelements, features, acts, operations and so forth. Also, the term “or”is used in its inclusive sense (and not in its exclusive sense) so thatwhen used, for example, to connect a list of elements, the term “or”means one, some, or all of the elements in the list. Conjunctivelanguage such as the phrase “at least one of X, Y, and Z,” unlessspecifically stated otherwise, is otherwise understood with the contextas used in general to convey that an item, term, etc. may be either X,Y, or Z. Thus, such conjunctive language is not generally intended toimply that certain embodiments require at least one of X, at least oneof Y, and at least one of Z to each be present.

The term “and/or” means that “and” applies to some embodiments and “or”applies to some embodiments. Thus, A, B, and/or C can be replaced withA, B, and C written in one sentence and A, B, or C written in anothersentence. A, B, and/or C means that some embodiments can include A andB, some embodiments can include A and C, some embodiments can include Band C, some embodiments can only include A, some embodiments can includeonly B, some embodiments can include only C, and some embodimentsinclude A, B, and C. The term “and/or” is used to avoid unnecessaryredundancy.

While certain example embodiments have been described, these embodimentshave been presented by way of example only, and are not intended tolimit the scope of the inventions disclosed herein. Thus, nothing in theforegoing description is intended to imply that any particular feature,characteristic, step, module, or block is necessary or indispensable.Indeed, the novel methods and systems described herein may be embodiedin a variety of other forms; furthermore, various omissions,substitutions, and changes in the form of the methods and systemsdescribed herein may be made without departing from the spirit of theinventions disclosed herein.

The following is claimed:
 1. An infrared detection device for detectingcoal mine polar gas, comprising: a stationary pool body having a gasinlet and a gas outlet; a stationary optical window coupled to thestationary pool body; and a moveable optical window moveably disposedinside the stationary pool body, wherein the moveable optical windowmoves with respect to the stationary pool body and in response to gasflowing through the gas inlet and the gas outlet.
 2. The infrareddetection device of claim 1, further comprising a protection cover forthe stationary optical window that couples the stationary optical windowto a front end of the stationary pool body.
 3. The infrared detectiondevice of claim 2, further comprising a stopper, an inside-pool stopsensor, and an outside-pool stop sensor located inside the stationarypool body.
 4. The infrared detection device of claim 3, furthercomprising a protection cover for the moveable optical window and acircular bracket coupled inside the stationary pool body.
 5. Theinfrared detection device of claim 4, wherein the protection cover forthe moveable optical window is provided with a gas discharge groove. 6.The infrared detection device of claim 5, further comprising a rear stopcover coupled to a rear end of the stationary pool body.
 7. The infrareddetection device of claim 6, further comprising a rear stop sensorcoupled to the rear end of the stationary pool body.
 8. The infrareddetection device of claim 7, further comprising a front stop sensorcoupled to the front end of the stationary pool body.
 9. The infrareddetection device of claim 1, further comprising a first electricalthree-way valve in fluid communication between the gas inlet and the gasoutlet.
 10. The infrared detection device of claim 9, further comprisinga second electrical three-way valve in fluid communication between thefirst electrical three-way valve and the gas inlet.
 11. The infrareddetection device of claim 10, further comprising a third electricalthree-way valve in fluid communication between the first electricalthree-way valve and the gas outlet.
 12. The infrared detection device ofclaim 11, further comprising a micro-air pump in fluid communicationbetween the third electrical three-way valve and the second electricalthree-way valve.
 13. The infrared detection device of claim 12, furthercomprising a fourth electrical three-way valve in fluid communicationbetween the micro-air pump and the second electrical three-way valve.14. The infrared detection device of claim 13, wherein the moveableoptical window moves along a first direction inside the stationary poolbody when gas flows through the gas inlet, and the moveable opticalwindow moves along a second direction inside the stationary pool bodywhen gas flows through the gas outlet, wherein the second direction isopposite from the first direction.
 15. The infrared detection device ofclaim 13, wherein the first electrical three-way valve, the secondelectrical three-way valve, the third electrical three-way valve, thefourth electrical three-way valve, and the micro-air pump are in fluidcommunication via tube-connections.
 16. The infrared detection device ofclaim 13, further comprising an electrical plug valve for gas inlet andan electrical plug valve for gas outlet.
 17. The infrared detectiondevice of claim 13, wherein the stationary optical window is coupled toa front end of the stationary pool body.
 18. The infrared detectiondevice of claim 13, wherein the first electrical three-way valve and thesecond electrical three-way valve are located adjacent a front end ofthe stationary pool body.
 19. The infrared detection device of claim 18,wherein the third electrical three-way valve, the fourth electricalthree-way valve, and the micro-air pump are located adjacent a rear endof the stationary pool body.
 20. The infrared detection device of claim1, further comprising a central processor disposed with an outer casing,the central processor electrically coupled to a power supply, a lightsource, a detector, an alarm and indication lamp, an input and outputmodule, a data collection and storage module, and a gas pool assemblyhaving a moveable optical window, wherein the power supply iselectrically coupled to a power supply switch and a power supplyinterface, the input and output module is coupled to a computercommunication interface, the data collection and storage module iselectrically coupled to the detector, and the gas pool assembly islocated between the light source and the detector.